Shirt decoration



FIG. 1 is a front elevational view of a first embodiment of a shirt decoration showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view of a second embodiment thereof; and,

FIG. 4 is a rear elevational view thereof.

The broken line showing of the human FIGURE and the shirt in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a shirt decoration, as shown and described. 